Tailoring Antiferromagnetic Orders and Spin Transport in Noncollinear Mn3Pt Multilayers

Tailoring Antiferromagnetic Orders and Spin Transport in Noncollinear Mn3Pt Multilayers

Advanced Functional Materials

10.1002/adfm.202507406

https://doi.org/10.1002/adfm.202507406

Shaohai Chen, Bee Chun Lim, Dennis J. X. Lin, Jian Rui Soh, Hui Ru Tan, Hang Khume Tan, Yu Yu Ko Hnin, Seng Kai Wong, Mingsheng Zhang, Robert Laskowski, Tieyang Zhao, Jingsheng Chen, Khoong Hong Khoo, Pin Ho

19 June 2025

Chen, S., Lim, B. C., Lin, D. J. X., Soh, J. R., Tan, H. R., Tan, H. K., Hnin, Y. Y. K., Wong, S. K., Zhang, M., Laskowski, R., Zhao, T., Chen, J., Khoo, K. H., & Ho, P. (2025). Tailoring Antiferromagnetic Orders and Spin Transport in Noncollinear Mn 3 Pt Multilayers. Advanced Functional Materials, 35(50). Portico. https://doi.org/10.1002/adfm.202507406

Abstract Noncollinear antiferromagnetic (NCAF) materials, such as Mn₃Pt, exhibit remarkable spin‐orbit and tunneling phenomena, positioning them as promising candidates for low‐power, stray‐field immune nanoelectronics. However, precise control of AF order and spin transport properties, and understanding of their physical mechanisms, remains challenging. In this work, the interplay between crystal structure, magnetic orders, and anomalous Hall effect (AHE) is established in single‐crystalline Mn₃Pt (001) synthesized from a [Mn/Pt] 20 multilayers with tunable Mn layer thickness ( t Mn ). Resonant elastic X‐ray scattering reveals a magnetic order transition at T c ≈240 K for the sample with t Mn = 0.7 nm, which notably coincides with an AHE polarity reversal at ≈230 K. Importantly, we demonstrate that T c can be precisely engineered by fine‐tuning t Mn to modulate lattice constant and spin canting. Further, first‐principles calculations affirm the lattice parameter and spin canting dependence of AHE from the ground‐state Γ 10 magnetic symmetry. Finally, a refined analytical model is introduced to elucidate the intrinsic and extrinsic AHE contributions in NCAF material comprising hybrid magnetic orders. These findings provide a robust framework for tailoring transport properties toward the realization of next‐generation AF computing technologies.

Publisher Copyright

This research / project is supported by the A*STAR - RIE2025 Manufacturing, Trade and Connectivity (MTC) Individual Research Grants
Grant Reference no. : M23M6c0101, M24N7c0086

This is the peer reviewed version of the following article: Chen, S., Lim, B. C., Lin, D. J. X., Soh, J. R., Tan, H. R., Tan, H. K., Hnin, Y. Y. K., Wong, S. K., Zhang, M., Laskowski, R., Zhao, T., Chen, J., Khoo, K. H., & Ho, P. (2025). Tailoring Antiferromagnetic Orders and Spin Transport in Noncollinear Mn 3 Pt Multilayers. Advanced Functional Materials, 35(50). Portico. https://doi.org/10.1002/adfm.202507406 , which has been published in final form at https://doi.org/10.1002/adfm.202507406. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

https://oar.a-star.edu.sg/communities-collections/articles/22654

1616-301X
1616-3028

Institute of Materials Research and Engineering